Driving mechanism for centrifugal creamers.



No. 800,858. PATENTBD OCT. 3, 1905.

P. L. KIMBALL.

DRIVING MECHANISM FOR CENTRIPUGAL CREAMERS. APPLICATION FILED 33.14, 1904.

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UNITED STATES PATENT FFICE.

PERLEY L. KIMBALL, OF BELLOW S FALLS, VERMONT, ASSIGNOR TO VERMONT FARM MACHINE COMPANY, OF BELLOWS FALLS, VER- MONT, A CORPORATION.

Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed April 14:, 1904. Serial No. 203.113.

To (all whom, it may concern.-

Be it known that I, PERLEY L. KIMBALL, a citizen of the United States of America, residing at Bellows Falls, in the county of IVindham and State of Vermont, have invented certain new and useful Improvements in Driving Mechanism for Centrifugal Creamers, of which the following is a specification.

As is well known, machines of this class are rotated at very high rates of speed, often as high as live or six thousand revolutions per minute, by means of a train of speedinggears. They are sometimes power-driven and sometimes hand-driven, a hand-driven machine being illustrated in Figure 1 of the drawings.

The object of this invention is to provide a safety device at some point in the train of gearing in order that the bowl may continue its rotation irrespective of the movement of the speedingtrain of gears if the gears should become stuck and broughtto a sudden stop as, for instance, the drive or crank gear-shaft might run dry and stick from lack of proper lubrication, or the intermediate gear-journals might heat and stick, or too severe strain upon the pin of the drive-crank might bend same and cause it to stick. If some such device is not provided and the driving mechanism should become stuck, serious damage would result to the machine and probably to the operator.

The invention herein illustrated and described is extremely eflicient in accomplishing the desired object, it is positive in its operation while driving, is noiseless, and is also simple and inexpensive in its construction.

Referring to the drawings, Fig. 1 is a view in elevation of a centrifugal creamer and the driving mechanism therefor, parts being broken away to show the construction. Fig. 2 is a view, on enlarged scale, showing in section the shaft and gears to which my invention is applied. Fig. 3 is a detail view of the end of the gear to which my invention is applied, showing the shaft in cross-section.

In the drawings, a is the separator-bowl, mounted in a suitable casing a and on a spindle 6, having a spiral thread cut therein, which meshes with a spiral gear 0 on the shaft (Z. A pinion e is mounted on the shaft (Z and is connected therewith by my novel form of gearing. This pinion meshes with the gear 6 on the shaft 6 on which there is also mounted the pinion e meshing with the gear 0*, mounted on the shaft a, to which is secured the handle (1.

The hub of the gear 0 is recessed, as at f, and in this recess there is located the bushing g, which is connected to move with the gear by the screw-key g. This bushing is cut away at one or more points, forming the recesses Z, whose outer walls Z are eccentric to the shaft (Z, the inclination in each case being in the same direction. In these recesses are located rollers 7'', which form a clutch connection between the shaft (Z and the gear 0. A folded spring s is located in each recess and bears on the rollers to force them toward the smaller end of the recess. It will be noted that the ends of these springs project beyond the folds toward the shaft, so that any wear of the shaft on the springs comes on their ends instead of on the folds, where it would tend to wear them out. It will be seen that, motion imparted to the pinion through the speeding-gears will be transmitted to the shaft through these rolls and that if after the bowl has been speeded up the gears become caught this clutch will allow the bowl to continue its rotation while the speeding-gears are stationary.

I claim as my invention In a driving mechanism for centrifugal creamers, the combination with a spindle having a spiral thread, of a shaft, a gear fixed on the shaft and meshing with said thread, a pinion loosely mounted on the shaft in close juxtaposition to the gear, and having an annular recess in its face adjacent the gear, a bushing mounted in said recess, and encircling the shaft, and locked to the pinion, said bushing extending slightly beyond the opening and engaging the side of the gear,

and having a series of concentrically-arranged cam-slots, a roller in each of said slots and a spring in each slot bearing against the roller tending to force the latter in engagement with the shaft, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

PERLEY L. KIM BALL.

Witnesses:

A. L. HAINEs, GEO. H. MUZZEY. 

